IX. ASPLEXIfM. 159 
on artificial rock-work. In the latter situation, its neat 
habit and glossy evergreen fronds render it very desirable. 
It may, too, be grown either in exposed or shaded situa- 
tions ; the chief difference being that, in the latter, it at- 
tains a greater degree of luxuriance. It is readily 
propagated by separating the crowns. 
4. Asplenium marinum, Lhincfus.Sea. Spleen- 
wort Fronds linear, or strap-shaped, pinnate; pinnae 
ovate or oblong serrated, stalked, unequally wedge shaped 
at the base ; rachis winged. 
ASPLEXICM MARINUM. Linnseus: Sm. Eng. Fl. iv., 294: Eng. 
Bot. 392: Hook and Am, FI. 573: Bab. Man. 414: Newm. 275: 
Florigr. Brit, iv., 69 : Franc. 49. 
/3. acutum ; fronds elongate ; pinnae narrow linear 
lanceolate elongate acute. 
The Sea Spleenwort has a tufted scaly caudex, pro- 
ducing wiry roots, by which it is so firmly fixed in its native 
rocks as to be with difficulty removed. The fronds, 
which are terminal and adherent to the caudex, are pin- 
nate, and of leathery texture, linear or linear-lanceolate, 
often much elongated, from two to twenty inches in 
length, the usual size being from six to twelve inches. 
The pinnae grow hi length after they become unfolded. 
The young fronds appear about the end of June, and re- 
main fresh and green until long after new fronds are 
produced the following year ; it is, therefore, truly ever- 
green. The stipes is smooth, varying from about one- 
sixth to one-half the length of the frond, and dark 
purplish-brown, almost black at the base, where a few 
narrow pointed scales are attached. The rachis is 
winged throughout, The puma; are stalked, serrated, and 
connected by the narrow wing of the rachis ; they vary 
in form, usually between obtuse-ovate and oblong, the 
base being always very unequal, the anterior side being 
rounded and sub-auricled, the posterior side truncate. In 
